观察瞳孔时应注意（）
A.对光反应
B.形状
C.大小
D.是否对称
E.以上都对
参考答案：A, B, C, D, E
用化学符号表示：①金刚石 ______②2个钠离子 ______③4个水分子 ______④镁元素显+2价 ______
You are assigned as the project manager in the middle of the project．The project is within the baselines，but the customer is not happy with the performance of the project．What is the FIRST thing you should do ？（）
A．Discuss it with the project tea
B．Recalculate baseline
C．Renegotiate the contrac
D．Meet with the custome
